In order to help policymakers, regulators, utilities, and other interested parties better understand the impact of state utility, ratepayer-funded energy efficiency programs, the American Council for an Energy-Efficient Economy (ACEEE) conducted a national review of state approaches to the net savings issue. ACEEE surveyed all 50 states and the District of Columbia, reviewed a large amount of recent industry literature, and conducted interviews with national energy efficiency program evaluation experts.

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